Auto-updated: July 16, 2026 · Data refreshes whenever either brand receives new reviews, offers or score changes.
Current Discount Codes
Plunge
No active offers. Check all coupons
SaunaBox
No active offers. Check all coupons
4-Dimension Scorecard
| Dimension | Plunge | SaunaBox |
|---|---|---|
| Trust Score (0–100) | 65.57/100WIN | 50/100 |
| Verified Reviews | 2 · ★5WIN | 0 |
| Product Range | 1 productsWIN | 0 products |
| Active Offers | 0 offers | 0 offers |
| Overall Winner | 🏆 Plunge | 0 win(s) |
Full Side-by-Side Comparison
- Founded 2020 in a garage by Michael Garrett; later joined by co-founder Ryan Duey
- Featured on Shark Tank alongside Robert Herjavec
- Grew through organic influencer gifting (Aubrey Marcus, Andrew Huberman, Tony Hawk, Rich Roll) rather than paid ads first
- Now sells both cold plunge tubs and saunas — not cold-plunge-only
- Product range spans $399 (SmartSteam Pro portable steam kit) to $4,990 (Forge traditional Finnish cabin) — confirm which product line you're actually comparing before judging price
- Certifications page includes downloadable, specific test reports (PFAS, VOCs, heavy metals/CP65, microplastics) rather than just certification badges
- Claims ETL certification, OEKO-TEX registration (SaunaBox GO tent), REACH and RoHS compliance
- Athlete endorsements from Dwyane Wade, Terrell Owens, and UFC's Max Holloway — brand-supplied signal, not independent verification
Products at a Glance
SaunaBox
No products yet.
About the Brands
Plunge
From a Shut-Down Spa to Shark Tank Plunge was founded in 2020 by Michael Garrett, who built the first prototype in a garage with his father after COVID-19 forced the closure of his brick-and-mortar float spa business. Ryan Duey later joined as a par…
Full profile →SaunaBox
SaunaBox positions itself as "the world's most accessible at-home sauna," and the product range backs that framing up with real price-point spread: a $399 portable steam kit on one end, a $4,990 traditional Finnish wood cabin on the other. It's a new…
Full profile →Frequently Asked Questions
Which is better: Plunge or SaunaBox?
Plunge edges ahead of SaunaBox with a higher Matrix Trust Score (65.57/100 vs 50/100), more verified reviews (2 vs 0), a larger product range (1 vs 0).
What are the trust scores for Plunge and SaunaBox?
Plunge has a Matrix Trust Score of 65.57/100 and SaunaBox scores 50/100, calculated from product ratings, review volume, and active offer activity.
Which brand has more verified reviews?
Plunge has more verified reviews (2 vs 0).
Do these brands have current discount codes?
Check the offers section above for the latest discount codes.
